./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:54:03,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:54:03,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:54:03,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:54:03,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:54:03,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:54:03,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:54:03,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:54:03,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:54:03,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:54:03,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:54:03,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:54:03,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:54:03,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:54:03,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:54:03,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:54:03,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:54:03,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:54:03,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:54:03,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:54:03,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:54:03,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:54:03,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:54:03,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:54:03,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:54:03,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:54:03,385 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:54:03,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:54:03,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:54:03,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:54:03,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:54:03,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:54:03,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:54:03,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:54:03,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:54:03,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:54:03,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:54:03,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:54:03,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:54:03,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:54:03,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:54:03,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-06 23:54:03,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:54:03,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:54:03,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:54:03,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:54:03,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:54:03,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:54:03,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:54:03,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:54:03,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:54:03,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:54:03,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:54:03,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:54:03,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2021-12-06 23:54:03,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:54:03,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:54:03,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:54:03,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:54:03,601 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:54:03,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-06 23:54:03,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/data/5ffddd558/7c1740ef8bea4c4da34b6b2917e1832f/FLAG095b25bfe [2021-12-06 23:54:03,987 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:54:03,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-06 23:54:03,992 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/data/5ffddd558/7c1740ef8bea4c4da34b6b2917e1832f/FLAG095b25bfe [2021-12-06 23:54:04,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/data/5ffddd558/7c1740ef8bea4c4da34b6b2917e1832f [2021-12-06 23:54:04,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:54:04,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:54:04,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:54:04,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:54:04,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:54:04,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7081713b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04, skipping insertion in model container [2021-12-06 23:54:04,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:54:04,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:54:04,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-06 23:54:04,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:54:04,554 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:54:04,565 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/sv-benchmarks/c/termination-numeric/Ackermann01-1.c[944,957] [2021-12-06 23:54:04,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:54:04,574 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:54:04,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04 WrapperNode [2021-12-06 23:54:04,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:54:04,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:54:04,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:54:04,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:54:04,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,596 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-06 23:54:04,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:54:04,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:54:04,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:54:04,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:54:04,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:54:04,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:54:04,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:54:04,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:54:04,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (1/1) ... [2021-12-06 23:54:04,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:54:04,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:04,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:54:04,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:54:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:54:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:54:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:54:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-06 23:54:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-06 23:54:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:54:04,707 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:54:04,708 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:54:04,794 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:54:04,798 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:54:04,798 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 23:54:04,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:54:04 BoogieIcfgContainer [2021-12-06 23:54:04,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:54:04,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:54:04,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:54:04,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:54:04,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:54:04" (1/3) ... [2021-12-06 23:54:04,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52365a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:54:04, skipping insertion in model container [2021-12-06 23:54:04,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:54:04" (2/3) ... [2021-12-06 23:54:04,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52365a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:54:04, skipping insertion in model container [2021-12-06 23:54:04,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:54:04" (3/3) ... [2021-12-06 23:54:04,805 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2021-12-06 23:54:04,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:54:04,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-06 23:54:04,844 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:54:04,849 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:54:04,849 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-06 23:54:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:54:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 23:54:04,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:04,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:04,866 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:04,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:04,870 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-06 23:54:04,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:04,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833979720] [2021-12-06 23:54:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:04,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833979720] [2021-12-06 23:54:05,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833979720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:05,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:54:05,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:54:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737925484] [2021-12-06 23:54:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:05,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:54:05,030 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,119 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-06 23:54:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:54:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 23:54:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,128 INFO L225 Difference]: With dead ends: 73 [2021-12-06 23:54:05,129 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 23:54:05,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:54:05,134 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 23:54:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-06 23:54:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:54:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-06 23:54:05,168 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-06 23:54:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,169 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-06 23:54:05,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-06 23:54:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:54:05,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:54:05,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-06 23:54:05,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:05,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45914188] [2021-12-06 23:54:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45914188] [2021-12-06 23:54:05,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45914188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:05,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:54:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:54:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086932067] [2021-12-06 23:54:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:05,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:54:05,208 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,245 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-06 23:54:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:54:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 23:54:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,247 INFO L225 Difference]: With dead ends: 51 [2021-12-06 23:54:05,247 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 23:54:05,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:54:05,249 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 23:54:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 23:54:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:54:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-06 23:54:05,258 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-06 23:54:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-06 23:54:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-06 23:54:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:54:05,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:54:05,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-06 23:54:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241157485] [2021-12-06 23:54:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241157485] [2021-12-06 23:54:05,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241157485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:05,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:54:05,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:54:05,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372943129] [2021-12-06 23:54:05,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:05,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:54:05,304 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,353 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-06 23:54:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:54:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 23:54:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,356 INFO L225 Difference]: With dead ends: 76 [2021-12-06 23:54:05,356 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 23:54:05,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:54:05,359 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 23:54:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-06 23:54:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 23:54:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-06 23:54:05,377 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-06 23:54:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,377 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-06 23:54:05,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-06 23:54:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 23:54:05,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:54:05,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-06 23:54:05,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:05,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164899121] [2021-12-06 23:54:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164899121] [2021-12-06 23:54:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164899121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:05,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:54:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:54:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583681087] [2021-12-06 23:54:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:05,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:54:05,422 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,470 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-06 23:54:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:54:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 23:54:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,472 INFO L225 Difference]: With dead ends: 116 [2021-12-06 23:54:05,472 INFO L226 Difference]: Without dead ends: 108 [2021-12-06 23:54:05,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:54:05,474 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-06 23:54:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-06 23:54:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 23:54:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-06 23:54:05,490 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-06 23:54:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,490 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-06 23:54:05,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-06 23:54:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 23:54:05,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:54:05,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:05,492 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-06 23:54:05,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955598149] [2021-12-06 23:54:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955598149] [2021-12-06 23:54:05,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955598149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:05,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:54:05,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:54:05,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929794424] [2021-12-06 23:54:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:54:05,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:54:05,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:54:05,524 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,556 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-06 23:54:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:54:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 23:54:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,557 INFO L225 Difference]: With dead ends: 168 [2021-12-06 23:54:05,557 INFO L226 Difference]: Without dead ends: 97 [2021-12-06 23:54:05,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:54:05,560 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-06 23:54:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-06 23:54:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 23:54:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-06 23:54:05,571 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-06 23:54:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,571 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-06 23:54:05,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-06 23:54:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 23:54:05,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:54:05,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-06 23:54:05,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576203228] [2021-12-06 23:54:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576203228] [2021-12-06 23:54:05,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576203228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:05,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975591169] [2021-12-06 23:54:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:05,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:05,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:05,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:54:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:54:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:05,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975591169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:05,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:05,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 23:54:05,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26372450] [2021-12-06 23:54:05,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:05,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:54:05,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:54:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:54:05,753 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:05,934 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-06 23:54:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:54:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 23:54:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:05,939 INFO L225 Difference]: With dead ends: 274 [2021-12-06 23:54:05,939 INFO L226 Difference]: Without dead ends: 272 [2021-12-06 23:54:05,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:54:05,941 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:05,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-06 23:54:05,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-06 23:54:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 23:54:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-06 23:54:05,976 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-06 23:54:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:05,976 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-06 23:54:05,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-06 23:54:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 23:54:05,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:05,978 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:05,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:54:06,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:06,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:06,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-06 23:54:06,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:06,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986677335] [2021-12-06 23:54:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:06,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:06,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986677335] [2021-12-06 23:54:06,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986677335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:06,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379838784] [2021-12-06 23:54:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:06,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:06,217 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:06,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:54:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:54:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:06,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:54:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379838784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:06,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:54:06,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-06 23:54:06,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603713777] [2021-12-06 23:54:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:06,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:54:06,291 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:06,345 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-12-06 23:54:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:54:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 23:54:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:06,348 INFO L225 Difference]: With dead ends: 328 [2021-12-06 23:54:06,349 INFO L226 Difference]: Without dead ends: 327 [2021-12-06 23:54:06,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:54:06,350 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:06,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 91 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-06 23:54:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-12-06 23:54:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-06 23:54:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-12-06 23:54:06,371 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-12-06 23:54:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:06,372 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-12-06 23:54:06,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-12-06 23:54:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:54:06,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:06,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:06,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:54:06,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:54:06,574 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-12-06 23:54:06,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:06,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106434823] [2021-12-06 23:54:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:06,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:06,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:06,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106434823] [2021-12-06 23:54:06,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106434823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:06,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131230825] [2021-12-06 23:54:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:06,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:06,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:06,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:06,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:54:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:06,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:54:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:06,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:06,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131230825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:06,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:06,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 23:54:06,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141127986] [2021-12-06 23:54:06,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:06,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:54:06,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:54:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:54:06,845 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:06,988 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-12-06 23:54:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:54:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 23:54:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:06,994 INFO L225 Difference]: With dead ends: 591 [2021-12-06 23:54:06,994 INFO L226 Difference]: Without dead ends: 590 [2021-12-06 23:54:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:54:06,996 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 167 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:06,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-06 23:54:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-12-06 23:54:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-06 23:54:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-12-06 23:54:07,042 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-12-06 23:54:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:07,042 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-12-06 23:54:07,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-12-06 23:54:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:54:07,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:07,044 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:07,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:54:07,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:54:07,245 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-06 23:54:07,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:07,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133211929] [2021-12-06 23:54:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:07,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:07,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:54:07,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133211929] [2021-12-06 23:54:07,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133211929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100259530] [2021-12-06 23:54:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:07,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:07,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:07,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:54:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:07,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:54:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:54:07,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:54:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100259530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:07,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:07,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-06 23:54:07,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437815467] [2021-12-06 23:54:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:07,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:54:07,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:54:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:54:07,478 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:54:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:07,699 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2021-12-06 23:54:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:54:07,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-12-06 23:54:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:07,705 INFO L225 Difference]: With dead ends: 870 [2021-12-06 23:54:07,705 INFO L226 Difference]: Without dead ends: 868 [2021-12-06 23:54:07,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:54:07,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:07,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-06 23:54:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2021-12-06 23:54:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-06 23:54:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2021-12-06 23:54:07,748 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2021-12-06 23:54:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2021-12-06 23:54:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:54:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2021-12-06 23:54:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:54:07,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:07,749 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:07,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:54:07,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:07,950 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-12-06 23:54:07,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150363268] [2021-12-06 23:54:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:07,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:54:08,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:08,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150363268] [2021-12-06 23:54:08,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150363268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:08,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998868179] [2021-12-06 23:54:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:08,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:08,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:08,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:54:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 23:54:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:54:08,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:54:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998868179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:54:08,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:54:08,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-06 23:54:08,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557756756] [2021-12-06 23:54:08,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:08,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:54:08,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:54:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:54:08,151 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:54:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:08,234 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2021-12-06 23:54:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:54:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-06 23:54:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:08,240 INFO L225 Difference]: With dead ends: 737 [2021-12-06 23:54:08,240 INFO L226 Difference]: Without dead ends: 736 [2021-12-06 23:54:08,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:54:08,242 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:08,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-06 23:54:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2021-12-06 23:54:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2021-12-06 23:54:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2021-12-06 23:54:08,286 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2021-12-06 23:54:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:08,286 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2021-12-06 23:54:08,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:54:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2021-12-06 23:54:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:54:08,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:08,287 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:08,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:54:08,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:08,489 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-06 23:54:08,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:08,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978218539] [2021-12-06 23:54:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:08,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:54:08,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978218539] [2021-12-06 23:54:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978218539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:08,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829603323] [2021-12-06 23:54:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:08,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:08,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:08,646 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:54:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:54:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:54:08,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:54:08,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829603323] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:08,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:54:08,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-12-06 23:54:08,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976398979] [2021-12-06 23:54:08,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:08,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:54:08,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:54:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:54:08,801 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:54:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:08,947 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2021-12-06 23:54:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:54:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-06 23:54:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:08,954 INFO L225 Difference]: With dead ends: 886 [2021-12-06 23:54:08,954 INFO L226 Difference]: Without dead ends: 885 [2021-12-06 23:54:08,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:54:08,956 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:08,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-12-06 23:54:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2021-12-06 23:54:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2021-12-06 23:54:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2021-12-06 23:54:09,008 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2021-12-06 23:54:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:09,008 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2021-12-06 23:54:09,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:54:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2021-12-06 23:54:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 23:54:09,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:09,010 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:09,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:54:09,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:54:09,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-06 23:54:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543297995] [2021-12-06 23:54:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:09,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:09,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:09,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:09,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543297995] [2021-12-06 23:54:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543297995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052640263] [2021-12-06 23:54:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:09,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:09,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:09,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:54:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:54:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:09,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:09,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052640263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:09,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:09,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-06 23:54:09,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503884143] [2021-12-06 23:54:09,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:09,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:54:09,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:54:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:54:09,460 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:09,813 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2021-12-06 23:54:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:54:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-12-06 23:54:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:09,827 INFO L225 Difference]: With dead ends: 1503 [2021-12-06 23:54:09,827 INFO L226 Difference]: Without dead ends: 1501 [2021-12-06 23:54:09,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:54:09,830 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:09,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 172 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-12-06 23:54:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2021-12-06 23:54:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2021-12-06 23:54:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2021-12-06 23:54:09,920 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2021-12-06 23:54:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:09,920 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2021-12-06 23:54:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2021-12-06 23:54:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:54:09,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:09,922 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:09,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:54:10,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:54:10,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-12-06 23:54:10,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:10,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347888674] [2021-12-06 23:54:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:10,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:10,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:54:10,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347888674] [2021-12-06 23:54:10,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347888674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520144509] [2021-12-06 23:54:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:10,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:10,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:54:10,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:54:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:54:10,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:54:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520144509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:10,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:10,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-06 23:54:10,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208550942] [2021-12-06 23:54:10,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:10,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:54:10,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:54:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:54:10,383 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:54:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:10,776 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2021-12-06 23:54:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:54:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-06 23:54:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:10,791 INFO L225 Difference]: With dead ends: 2355 [2021-12-06 23:54:10,791 INFO L226 Difference]: Without dead ends: 2338 [2021-12-06 23:54:10,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:54:10,793 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:10,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 162 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:54:10,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2021-12-06 23:54:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2021-12-06 23:54:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2021-12-06 23:54:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2021-12-06 23:54:10,895 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2021-12-06 23:54:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:10,895 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2021-12-06 23:54:10,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:54:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2021-12-06 23:54:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:54:10,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:10,897 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:10,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:54:11,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:54:11,098 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-06 23:54:11,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:11,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901473778] [2021-12-06 23:54:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:11,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:11,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901473778] [2021-12-06 23:54:11,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901473778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145736007] [2021-12-06 23:54:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:11,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:11,306 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:11,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:54:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:54:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:11,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:11,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145736007] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:11,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:54:11,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-06 23:54:11,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807790325] [2021-12-06 23:54:11,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:54:11,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:54:11,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:11,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:54:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:54:11,494 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:54:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:11,660 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2021-12-06 23:54:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:54:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-06 23:54:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:11,677 INFO L225 Difference]: With dead ends: 1910 [2021-12-06 23:54:11,677 INFO L226 Difference]: Without dead ends: 1909 [2021-12-06 23:54:11,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:54:11,679 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:11,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-06 23:54:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2021-12-06 23:54:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2021-12-06 23:54:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2021-12-06 23:54:11,772 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2021-12-06 23:54:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:11,773 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2021-12-06 23:54:11,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:54:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2021-12-06 23:54:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:54:11,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:11,774 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:11,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:54:11,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:54:11,975 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-12-06 23:54:11,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456206606] [2021-12-06 23:54:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:11,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:12,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:54:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 23:54:12,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:12,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456206606] [2021-12-06 23:54:12,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456206606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:12,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096219308] [2021-12-06 23:54:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:12,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:12,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:12,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:12,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:54:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:54:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:54:12,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:54:12,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096219308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:12,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:12,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-12-06 23:54:12,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990314288] [2021-12-06 23:54:12,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:12,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:54:12,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:54:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:54:12,168 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:54:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:12,274 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2021-12-06 23:54:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:54:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-12-06 23:54:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:12,280 INFO L225 Difference]: With dead ends: 2467 [2021-12-06 23:54:12,280 INFO L226 Difference]: Without dead ends: 869 [2021-12-06 23:54:12,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:54:12,290 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:12,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-12-06 23:54:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2021-12-06 23:54:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2021-12-06 23:54:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2021-12-06 23:54:12,327 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2021-12-06 23:54:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:12,327 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2021-12-06 23:54:12,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-06 23:54:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2021-12-06 23:54:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 23:54:12,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:12,328 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:12,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:54:12,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:54:12,530 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-12-06 23:54:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509137375] [2021-12-06 23:54:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:12,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:12,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:12,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509137375] [2021-12-06 23:54:12,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509137375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:12,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143488557] [2021-12-06 23:54:12,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:12,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:12,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:12,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:12,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:54:12,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:12,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:54:12,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:12,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:12,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143488557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:12,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:12,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 23:54:12,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407109975] [2021-12-06 23:54:12,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:12,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:54:12,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:54:12,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:54:12,890 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:13,180 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2021-12-06 23:54:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:54:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 23:54:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:13,188 INFO L225 Difference]: With dead ends: 1623 [2021-12-06 23:54:13,188 INFO L226 Difference]: Without dead ends: 1622 [2021-12-06 23:54:13,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:54:13,190 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 419 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:13,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 379 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-06 23:54:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2021-12-06 23:54:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2021-12-06 23:54:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2021-12-06 23:54:13,261 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2021-12-06 23:54:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2021-12-06 23:54:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2021-12-06 23:54:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 23:54:13,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:13,263 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:13,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 23:54:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:13,465 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-06 23:54:13,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151322436] [2021-12-06 23:54:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:13,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:13,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151322436] [2021-12-06 23:54:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151322436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:13,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937044224] [2021-12-06 23:54:13,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:13,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:13,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:54:13,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:13,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:54:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:13,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:13,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937044224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:13,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:13,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-06 23:54:13,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437791921] [2021-12-06 23:54:13,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:13,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:54:13,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:54:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:54:13,797 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:14,447 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2021-12-06 23:54:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:54:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-12-06 23:54:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:14,463 INFO L225 Difference]: With dead ends: 3056 [2021-12-06 23:54:14,463 INFO L226 Difference]: Without dead ends: 2163 [2021-12-06 23:54:14,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:54:14,472 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 298 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:54:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-12-06 23:54:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2021-12-06 23:54:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2021-12-06 23:54:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2021-12-06 23:54:14,566 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2021-12-06 23:54:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:14,567 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2021-12-06 23:54:14,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2021-12-06 23:54:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 23:54:14,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:14,568 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:14,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:54:14,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:14,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-06 23:54:14,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009647815] [2021-12-06 23:54:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:14,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:54:14,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009647815] [2021-12-06 23:54:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009647815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82872747] [2021-12-06 23:54:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:14,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:14,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:14,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:54:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:54:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:54:14,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:54:15,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82872747] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:15,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:15,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-06 23:54:15,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282647058] [2021-12-06 23:54:15,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:15,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:54:15,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:54:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:54:15,221 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:54:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:16,039 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2021-12-06 23:54:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 23:54:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2021-12-06 23:54:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:16,066 INFO L225 Difference]: With dead ends: 4064 [2021-12-06 23:54:16,066 INFO L226 Difference]: Without dead ends: 4060 [2021-12-06 23:54:16,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 23:54:16,071 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:16,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 246 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:54:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2021-12-06 23:54:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2021-12-06 23:54:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2021-12-06 23:54:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2021-12-06 23:54:16,259 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2021-12-06 23:54:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:16,260 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2021-12-06 23:54:16,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:54:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2021-12-06 23:54:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 23:54:16,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:16,261 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:16,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:54:16,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:54:16,462 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-06 23:54:16,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011926109] [2021-12-06 23:54:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:16,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:54:16,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011926109] [2021-12-06 23:54:16,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011926109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601193227] [2021-12-06 23:54:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:16,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:16,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:54:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:16,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:54:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:54:16,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:54:16,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601193227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:16,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:16,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 23:54:16,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535969656] [2021-12-06 23:54:16,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:16,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:54:16,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:54:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:54:16,742 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:17,326 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2021-12-06 23:54:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:54:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 23:54:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:17,374 INFO L225 Difference]: With dead ends: 7961 [2021-12-06 23:54:17,374 INFO L226 Difference]: Without dead ends: 7960 [2021-12-06 23:54:17,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:54:17,378 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 891 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:17,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 323 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:54:17,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-12-06 23:54:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2021-12-06 23:54:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2021-12-06 23:54:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2021-12-06 23:54:17,846 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2021-12-06 23:54:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:17,846 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2021-12-06 23:54:17,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2021-12-06 23:54:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 23:54:17,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:17,848 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:17,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:54:18,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:18,050 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-06 23:54:18,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:18,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067758806] [2021-12-06 23:54:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:18,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:54:18,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067758806] [2021-12-06 23:54:18,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067758806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988031594] [2021-12-06 23:54:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:18,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:18,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:18,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:18,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:54:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:54:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:54:18,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:54:18,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988031594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:18,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:18,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-06 23:54:18,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409820228] [2021-12-06 23:54:18,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:18,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:54:18,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:18,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:54:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:54:18,600 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:54:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:20,654 INFO L93 Difference]: Finished difference Result 29449 states and 111079 transitions. [2021-12-06 23:54:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 23:54:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-12-06 23:54:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:20,869 INFO L225 Difference]: With dead ends: 29449 [2021-12-06 23:54:20,869 INFO L226 Difference]: Without dead ends: 22920 [2021-12-06 23:54:20,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 23:54:20,989 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:20,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 297 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:54:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22920 states. [2021-12-06 23:54:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22920 to 16604. [2021-12-06 23:54:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2021-12-06 23:54:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2021-12-06 23:54:22,839 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2021-12-06 23:54:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:22,839 INFO L470 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2021-12-06 23:54:22,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-06 23:54:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2021-12-06 23:54:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 23:54:22,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:22,843 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:22,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:54:23,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:23,044 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2021-12-06 23:54:23,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546955839] [2021-12-06 23:54:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:23,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 23:54:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:54:23,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:23,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546955839] [2021-12-06 23:54:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546955839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:23,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019162862] [2021-12-06 23:54:23,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:23,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:23,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:23,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:23,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:54:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 23:54:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 23:54:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:54:23,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019162862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:23,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:23,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-06 23:54:23,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321862895] [2021-12-06 23:54:23,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:23,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 23:54:23,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 23:54:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:54:23,822 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:54:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:25,002 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2021-12-06 23:54:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:54:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-12-06 23:54:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:25,055 INFO L225 Difference]: With dead ends: 25458 [2021-12-06 23:54:25,055 INFO L226 Difference]: Without dead ends: 10209 [2021-12-06 23:54:25,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 23:54:25,189 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:25,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 319 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:54:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-12-06 23:54:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2021-12-06 23:54:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2021-12-06 23:54:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2021-12-06 23:54:25,861 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 81 [2021-12-06 23:54:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:25,861 INFO L470 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2021-12-06 23:54:25,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-06 23:54:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2021-12-06 23:54:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 23:54:25,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:25,865 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:25,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:54:26,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:54:26,065 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-06 23:54:26,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:26,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380674155] [2021-12-06 23:54:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:26,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:26,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:26,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380674155] [2021-12-06 23:54:26,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380674155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:26,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719818964] [2021-12-06 23:54:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:54:26,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:26,156 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:26,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:54:26,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 23:54:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:26,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:54:26,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:26,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:54:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719818964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:26,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:26,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-06 23:54:26,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287585813] [2021-12-06 23:54:26,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:26,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 23:54:26,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 23:54:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:54:26,513 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:27,408 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2021-12-06 23:54:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:54:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-06 23:54:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:27,435 INFO L225 Difference]: With dead ends: 10357 [2021-12-06 23:54:27,435 INFO L226 Difference]: Without dead ends: 10356 [2021-12-06 23:54:27,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:54:27,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 259 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:27,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 277 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:54:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2021-12-06 23:54:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2021-12-06 23:54:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2021-12-06 23:54:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2021-12-06 23:54:27,926 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2021-12-06 23:54:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:27,926 INFO L470 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2021-12-06 23:54:27,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:54:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2021-12-06 23:54:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 23:54:27,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:27,929 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:27,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:54:28,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:28,130 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:28,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1324062136, now seen corresponding path program 2 times [2021-12-06 23:54:28,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:28,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213244809] [2021-12-06 23:54:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:28,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:54:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 23:54:28,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213244809] [2021-12-06 23:54:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213244809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193115695] [2021-12-06 23:54:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:28,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:28,203 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:28,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:54:28,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:28,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:54:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 23:54:28,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 23:54:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193115695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:28,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-06 23:54:28,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495523154] [2021-12-06 23:54:28,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:28,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:54:28,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:54:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:54:28,518 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-06 23:54:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:29,001 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2021-12-06 23:54:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:54:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 80 [2021-12-06 23:54:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:29,035 INFO L225 Difference]: With dead ends: 18932 [2021-12-06 23:54:29,035 INFO L226 Difference]: Without dead ends: 10758 [2021-12-06 23:54:29,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:54:29,065 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:29,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 93 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:54:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2021-12-06 23:54:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2021-12-06 23:54:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2021-12-06 23:54:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2021-12-06 23:54:29,561 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 80 [2021-12-06 23:54:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:29,561 INFO L470 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2021-12-06 23:54:29,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-06 23:54:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2021-12-06 23:54:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 23:54:29,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:29,565 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:29,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:54:29,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:29,766 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-06 23:54:29,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:29,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125279823] [2021-12-06 23:54:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:29,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:54:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:54:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 23:54:29,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125279823] [2021-12-06 23:54:29,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125279823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280784323] [2021-12-06 23:54:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:54:29,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:29,910 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:54:29,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 23:54:29,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:54:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:54:30,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:54:30,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280784323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:30,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:30,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-06 23:54:30,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302935870] [2021-12-06 23:54:30,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:30,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:54:30,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:54:30,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:54:30,492 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 23:54:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:31,098 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2021-12-06 23:54:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:54:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2021-12-06 23:54:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:31,142 INFO L225 Difference]: With dead ends: 20497 [2021-12-06 23:54:31,142 INFO L226 Difference]: Without dead ends: 12358 [2021-12-06 23:54:31,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:54:31,176 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 67 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:31,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:54:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2021-12-06 23:54:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2021-12-06 23:54:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2021-12-06 23:54:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-12-06 23:54:31,818 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-12-06 23:54:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:31,819 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-12-06 23:54:31,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-06 23:54:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-12-06 23:54:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 23:54:31,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:31,824 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:31,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:54:32,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:32,025 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:32,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-06 23:54:32,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532484950] [2021-12-06 23:54:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:32,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:32,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:54:32,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532484950] [2021-12-06 23:54:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532484950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:32,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462637412] [2021-12-06 23:54:32,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:54:32,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:32,223 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:32,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:54:32,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 23:54:32,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 23:54:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 23:54:32,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-06 23:54:32,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462637412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:32,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-06 23:54:32,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333405572] [2021-12-06 23:54:32,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:54:32,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:54:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:54:32,560 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 23:54:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:33,871 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-12-06 23:54:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:54:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-12-06 23:54:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:33,925 INFO L225 Difference]: With dead ends: 20852 [2021-12-06 23:54:33,926 INFO L226 Difference]: Without dead ends: 10359 [2021-12-06 23:54:33,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 23:54:33,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 218 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 156 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:54:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-12-06 23:54:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-12-06 23:54:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2021-12-06 23:54:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-12-06 23:54:34,641 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-12-06 23:54:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:34,641 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-12-06 23:54:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 23:54:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-12-06 23:54:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 23:54:34,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:34,645 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:34,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 23:54:34,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:34,846 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-06 23:54:34,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:34,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900272902] [2021-12-06 23:54:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:34,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:54:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:34,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:34,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:34,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:35,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:35,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:54:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:35,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:54:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-06 23:54:35,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:35,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900272902] [2021-12-06 23:54:35,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900272902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:35,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176726044] [2021-12-06 23:54:35,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:54:35,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:35,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:35,058 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:35,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:54:35,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:54:35,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 23:54:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 23:54:35,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:54:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176726044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:36,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:36,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-06 23:54:36,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521004052] [2021-12-06 23:54:36,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:36,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 23:54:36,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 23:54:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:54:36,061 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-06 23:54:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:39,007 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-12-06 23:54:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-06 23:54:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2021-12-06 23:54:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:39,109 INFO L225 Difference]: With dead ends: 29169 [2021-12-06 23:54:39,109 INFO L226 Difference]: Without dead ends: 28067 [2021-12-06 23:54:39,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12241 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 23:54:39,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:39,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 360 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:54:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-12-06 23:54:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-12-06 23:54:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2021-12-06 23:54:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-12-06 23:54:40,250 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-12-06 23:54:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:40,251 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-12-06 23:54:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-06 23:54:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-12-06 23:54:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:54:40,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:40,253 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:40,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:54:40,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:54:40,454 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:40,456 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-12-06 23:54:40,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:40,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484727154] [2021-12-06 23:54:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:40,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:40,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484727154] [2021-12-06 23:54:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484727154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873905819] [2021-12-06 23:54:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:54:40,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:40,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:40,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 23:54:40,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 23:54:40,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 23:54:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:40,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:54:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873905819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:41,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:41,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-06 23:54:41,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107754534] [2021-12-06 23:54:41,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:41,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:54:41,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:54:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:54:41,133 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:42,975 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-12-06 23:54:42,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 23:54:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-06 23:54:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:43,080 INFO L225 Difference]: With dead ends: 28628 [2021-12-06 23:54:43,081 INFO L226 Difference]: Without dead ends: 28627 [2021-12-06 23:54:43,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:54:43,098 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1085 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:43,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 754 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:54:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-12-06 23:54:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-12-06 23:54:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2021-12-06 23:54:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-12-06 23:54:44,699 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-12-06 23:54:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-12-06 23:54:44,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-12-06 23:54:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 23:54:44,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:44,709 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:44,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 23:54:44,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 23:54:44,911 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-06 23:54:44,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711953725] [2021-12-06 23:54:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:44,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:54:45,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711953725] [2021-12-06 23:54:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711953725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629385820] [2021-12-06 23:54:45,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:54:45,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:45,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:45,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 23:54:45,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:54:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:54:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 23:54:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:54:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-06 23:54:45,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629385820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:45,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:45,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-06 23:54:45,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824813854] [2021-12-06 23:54:45,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:45,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:54:45,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:54:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:54:45,692 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:49,036 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2021-12-06 23:54:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 23:54:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-06 23:54:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:54:49,261 INFO L225 Difference]: With dead ends: 64728 [2021-12-06 23:54:49,261 INFO L226 Difference]: Without dead ends: 64727 [2021-12-06 23:54:49,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:54:49,287 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1618 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:54:49,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 561 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:54:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2021-12-06 23:54:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2021-12-06 23:54:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2021-12-06 23:54:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2021-12-06 23:54:53,031 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2021-12-06 23:54:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:54:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2021-12-06 23:54:53,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:54:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2021-12-06 23:54:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-06 23:54:53,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:54:53,051 INFO L514 BasicCegarLoop]: trace histogram [21, 17, 14, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:54:53,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 23:54:53,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:54:53,252 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:54:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:54:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1518151305, now seen corresponding path program 1 times [2021-12-06 23:54:53,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:54:53,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953839903] [2021-12-06 23:54:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:53,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:54:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-06 23:54:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:54:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:54:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:54:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:54:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:54:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:54:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:54:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 445 proven. 214 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-12-06 23:54:53,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:54:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953839903] [2021-12-06 23:54:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953839903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:54:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974710789] [2021-12-06 23:54:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:54:53,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:54:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:54:53,548 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:54:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 23:54:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:54:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:54:53,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:54:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 433 proven. 216 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-06 23:54:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:54:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 449 proven. 263 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-06 23:54:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974710789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:54:54,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:54:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-06 23:54:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782708286] [2021-12-06 23:54:54,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:54:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:54:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:54:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:54:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:54:54,992 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-06 23:54:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:54:59,839 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2021-12-06 23:54:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:54:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 193 [2021-12-06 23:54:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:00,327 INFO L225 Difference]: With dead ends: 152847 [2021-12-06 23:55:00,328 INFO L226 Difference]: Without dead ends: 94875 [2021-12-06 23:55:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:55:00,667 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:00,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 294 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:55:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states. [2021-12-06 23:55:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94875 to 64457. [2021-12-06 23:55:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64457 states, 41867 states have (on average 1.0287338476604486) internal successors, (43070), 42734 states have internal predecessors, (43070), 13081 states have call successors, (13081), 1564 states have call predecessors, (13081), 9505 states have return successors, (44883), 20158 states have call predecessors, (44883), 12967 states have call successors, (44883) [2021-12-06 23:55:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64457 states to 64457 states and 101034 transitions. [2021-12-06 23:55:05,781 INFO L78 Accepts]: Start accepts. Automaton has 64457 states and 101034 transitions. Word has length 193 [2021-12-06 23:55:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:05,781 INFO L470 AbstractCegarLoop]: Abstraction has 64457 states and 101034 transitions. [2021-12-06 23:55:05,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-06 23:55:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64457 states and 101034 transitions. [2021-12-06 23:55:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-06 23:55:05,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:05,803 INFO L514 BasicCegarLoop]: trace histogram [27, 21, 16, 13, 13, 13, 13, 13, 13, 11, 10, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:05,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 23:55:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:55:06,004 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:55:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1178558436, now seen corresponding path program 5 times [2021-12-06 23:55:06,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:06,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779751454] [2021-12-06 23:55:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:06,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:55:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:55:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:55:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:55:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 23:55:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:55:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:55:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:55:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:55:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:55:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:55:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:55:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:55:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 460 proven. 275 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2021-12-06 23:55:06,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:06,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779751454] [2021-12-06 23:55:06,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779751454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:55:06,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904194695] [2021-12-06 23:55:06,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:55:06,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:55:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:55:06,495 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:55:06,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 23:55:06,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 23:55:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:55:06,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 23:55:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:55:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 939 proven. 60 refuted. 0 times theorem prover too weak. 863 trivial. 0 not checked. [2021-12-06 23:55:06,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:55:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 207 proven. 618 refuted. 0 times theorem prover too weak. 1037 trivial. 0 not checked. [2021-12-06 23:55:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904194695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:55:07,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:55:07,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 21] total 52 [2021-12-06 23:55:07,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507576933] [2021-12-06 23:55:07,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:55:07,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 23:55:07,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 23:55:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 23:55:07,304 INFO L87 Difference]: Start difference. First operand 64457 states and 101034 transitions. Second operand has 52 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 36 states have internal predecessors, (119), 15 states have call successors, (21), 7 states have call predecessors, (21), 17 states have return successors, (30), 23 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-06 23:55:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:16,509 INFO L93 Difference]: Finished difference Result 174257 states and 365214 transitions. [2021-12-06 23:55:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 291 states. [2021-12-06 23:55:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 36 states have internal predecessors, (119), 15 states have call successors, (21), 7 states have call predecessors, (21), 17 states have return successors, (30), 23 states have call predecessors, (30), 10 states have call successors, (30) Word has length 243 [2021-12-06 23:55:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:55:17,490 INFO L225 Difference]: With dead ends: 174257 [2021-12-06 23:55:17,491 INFO L226 Difference]: Without dead ends: 110968 [2021-12-06 23:55:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50007 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=14185, Invalid=97705, Unknown=0, NotChecked=0, Total=111890 [2021-12-06 23:55:17,863 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 479 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 3469 mSolverCounterSat, 2608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 6077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2608 IncrementalHoareTripleChecker+Valid, 3469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:55:17,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 616 Invalid, 6077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2608 Valid, 3469 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:55:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110968 states. [2021-12-06 23:55:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110968 to 31518. [2021-12-06 23:55:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31518 states, 20278 states have (on average 1.0158792780353092) internal successors, (20600), 20223 states have internal predecessors, (20600), 6456 states have call successors, (6456), 830 states have call predecessors, (6456), 4780 states have return successors, (27585), 10464 states have call predecessors, (27585), 6446 states have call successors, (27585) [2021-12-06 23:55:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31518 states to 31518 states and 54641 transitions. [2021-12-06 23:55:23,335 INFO L78 Accepts]: Start accepts. Automaton has 31518 states and 54641 transitions. Word has length 243 [2021-12-06 23:55:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:55:23,336 INFO L470 AbstractCegarLoop]: Abstraction has 31518 states and 54641 transitions. [2021-12-06 23:55:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 36 states have internal predecessors, (119), 15 states have call successors, (21), 7 states have call predecessors, (21), 17 states have return successors, (30), 23 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-06 23:55:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 31518 states and 54641 transitions. [2021-12-06 23:55:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-06 23:55:23,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:55:23,343 INFO L514 BasicCegarLoop]: trace histogram [20, 18, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:55:23,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 23:55:23,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:55:23,544 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:55:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:55:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -713041155, now seen corresponding path program 6 times [2021-12-06 23:55:23,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:55:23,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939868604] [2021-12-06 23:55:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:55:23,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:55:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 23:55:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:55:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:55:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:55:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:55:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:55:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:55:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:55:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:55:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:55:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:23,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:55:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:55:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 161 proven. 350 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2021-12-06 23:55:24,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:55:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939868604] [2021-12-06 23:55:24,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939868604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:55:24,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92438568] [2021-12-06 23:55:24,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:55:24,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:55:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:55:24,006 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:55:24,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 23:55:24,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 23:55:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:55:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 23:55:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:55:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 119 proven. 352 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-12-06 23:55:24,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:55:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 137 proven. 514 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-12-06 23:55:30,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92438568] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:55:30,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:55:30,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 48] total 82 [2021-12-06 23:55:30,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524801563] [2021-12-06 23:55:30,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:55:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 23:55:30,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:55:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 23:55:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=6039, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 23:55:30,378 INFO L87 Difference]: Start difference. First operand 31518 states and 54641 transitions. Second operand has 83 states, 82 states have (on average 1.6219512195121952) internal successors, (133), 63 states have internal predecessors, (133), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 23:55:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:55:57,843 INFO L93 Difference]: Finished difference Result 363619 states and 808295 transitions. [2021-12-06 23:55:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 823 states. [2021-12-06 23:55:57,844 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.6219512195121952) internal successors, (133), 63 states have internal predecessors, (133), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 185 [2021-12-06 23:55:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:00,889 INFO L225 Difference]: With dead ends: 363619 [2021-12-06 23:56:00,889 INFO L226 Difference]: Without dead ends: 363032 [2021-12-06 23:56:01,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 899 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428607 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=135663, Invalid=675237, Unknown=0, NotChecked=0, Total=810900 [2021-12-06 23:56:01,396 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 430 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 4300 mSolverCounterSat, 6199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 10499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6199 IncrementalHoareTripleChecker+Valid, 4300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:01,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 488 Invalid, 10499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6199 Valid, 4300 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 23:56:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363032 states. [2021-12-06 23:57:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363032 to 39761. [2021-12-06 23:57:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39761 states, 25218 states have (on average 1.0127290030930287) internal successors, (25539), 25142 states have internal predecessors, (25539), 8491 states have call successors, (8491), 913 states have call predecessors, (8491), 6048 states have return successors, (28263), 13705 states have call predecessors, (28263), 8481 states have call successors, (28263) [2021-12-06 23:57:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39761 states to 39761 states and 62293 transitions. [2021-12-06 23:57:03,249 INFO L78 Accepts]: Start accepts. Automaton has 39761 states and 62293 transitions. Word has length 185 [2021-12-06 23:57:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:03,249 INFO L470 AbstractCegarLoop]: Abstraction has 39761 states and 62293 transitions. [2021-12-06 23:57:03,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.6219512195121952) internal successors, (133), 63 states have internal predecessors, (133), 19 states have call successors, (21), 3 states have call predecessors, (21), 29 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-06 23:57:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 39761 states and 62293 transitions. [2021-12-06 23:57:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 23:57:03,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:03,255 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:03,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 23:57:03,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:03,457 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:57:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:03,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1134480241, now seen corresponding path program 4 times [2021-12-06 23:57:03,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:03,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130554012] [2021-12-06 23:57:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:03,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:03,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:03,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130554012] [2021-12-06 23:57:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130554012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:03,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568676408] [2021-12-06 23:57:03,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:57:03,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:03,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:03,918 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 23:57:04,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:57:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:57:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 23:57:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:04,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:57:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:05,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568676408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:57:05,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:57:05,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-06 23:57:05,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880868712] [2021-12-06 23:57:05,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:57:05,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 23:57:05,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 23:57:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 23:57:05,321 INFO L87 Difference]: Start difference. First operand 39761 states and 62293 transitions. Second operand has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:10,400 INFO L93 Difference]: Finished difference Result 43026 states and 66661 transitions. [2021-12-06 23:57:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-06 23:57:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-12-06 23:57:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:10,556 INFO L225 Difference]: With dead ends: 43026 [2021-12-06 23:57:10,556 INFO L226 Difference]: Without dead ends: 43025 [2021-12-06 23:57:10,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 23:57:10,577 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1916 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:10,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 1519 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1173 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43025 states. [2021-12-06 23:57:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43025 to 43025. [2021-12-06 23:57:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43025 states, 27234 states have (on average 1.0126679885437322) internal successors, (27579), 27182 states have internal predecessors, (27579), 9139 states have call successors, (9139), 937 states have call predecessors, (9139), 6648 states have return successors, (29919), 14905 states have call predecessors, (29919), 9129 states have call successors, (29919) [2021-12-06 23:57:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43025 states to 43025 states and 66637 transitions. [2021-12-06 23:57:13,505 INFO L78 Accepts]: Start accepts. Automaton has 43025 states and 66637 transitions. Word has length 188 [2021-12-06 23:57:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:13,506 INFO L470 AbstractCegarLoop]: Abstraction has 43025 states and 66637 transitions. [2021-12-06 23:57:13,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 3.5161290322580645) internal successors, (327), 50 states have internal predecessors, (327), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 43025 states and 66637 transitions. [2021-12-06 23:57:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-06 23:57:13,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:13,534 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:13,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 23:57:13,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:13,735 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:57:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1149051225, now seen corresponding path program 3 times [2021-12-06 23:57:13,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020334560] [2021-12-06 23:57:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:13,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:57:14,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020334560] [2021-12-06 23:57:14,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020334560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444384060] [2021-12-06 23:57:14,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:57:14,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:14,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:14,324 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:14,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 23:57:14,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-12-06 23:57:14,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:57:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 23:57:14,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:57:14,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:57:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4623 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 23:57:15,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444384060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:57:15,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:57:15,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-06 23:57:15,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27069249] [2021-12-06 23:57:15,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:57:15,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 23:57:15,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 23:57:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 23:57:15,957 INFO L87 Difference]: Start difference. First operand 43025 states and 66637 transitions. Second operand has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:23,605 INFO L93 Difference]: Finished difference Result 86028 states and 134293 transitions. [2021-12-06 23:57:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-06 23:57:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2021-12-06 23:57:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:23,935 INFO L225 Difference]: With dead ends: 86028 [2021-12-06 23:57:23,935 INFO L226 Difference]: Without dead ends: 86027 [2021-12-06 23:57:23,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10814, Invalid=23968, Unknown=0, NotChecked=0, Total=34782 [2021-12-06 23:57:23,973 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 6195 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 2306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6198 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2306 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:23,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6198 Valid, 1047 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2306 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:57:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86027 states. [2021-12-06 23:57:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86027 to 85937. [2021-12-06 23:57:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85937 states, 54474 states have (on average 1.0125013768036126) internal successors, (55155), 54302 states have internal predecessors, (55155), 18307 states have call successors, (18307), 1945 states have call predecessors, (18307), 13152 states have return successors, (60807), 29689 states have call predecessors, (60807), 18297 states have call successors, (60807) [2021-12-06 23:57:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85937 states to 85937 states and 134269 transitions. [2021-12-06 23:57:29,795 INFO L78 Accepts]: Start accepts. Automaton has 85937 states and 134269 transitions. Word has length 310 [2021-12-06 23:57:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:29,796 INFO L470 AbstractCegarLoop]: Abstraction has 85937 states and 134269 transitions. [2021-12-06 23:57:29,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.6947368421052635) internal successors, (446), 50 states have internal predecessors, (446), 46 states have call successors, (88), 46 states have call predecessors, (88), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:57:29,796 INFO L276 IsEmpty]: Start isEmpty. Operand 85937 states and 134269 transitions. [2021-12-06 23:57:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-12-06 23:57:29,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:29,822 INFO L514 BasicCegarLoop]: trace histogram [47, 37, 31, 25, 25, 25, 24, 24, 24, 16, 16, 16, 16, 16, 16, 15, 15, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:29,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 23:57:30,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 23:57:30,023 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:57:30,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -294404291, now seen corresponding path program 2 times [2021-12-06 23:57:30,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:30,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378418183] [2021-12-06 23:57:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:30,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 23:57:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:57:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:57:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:57:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-06 23:57:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:57:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:57:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:57:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:57:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:57:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:57:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:57:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:57:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 1182 proven. 2442 refuted. 0 times theorem prover too weak. 2432 trivial. 0 not checked. [2021-12-06 23:57:30,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378418183] [2021-12-06 23:57:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378418183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12936245] [2021-12-06 23:57:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:57:30,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:30,627 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:30,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 23:57:30,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:57:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:57:30,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:57:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 469 proven. 2494 refuted. 0 times theorem prover too weak. 3093 trivial. 0 not checked. [2021-12-06 23:57:31,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:57:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 469 proven. 2570 refuted. 0 times theorem prover too weak. 3017 trivial. 0 not checked. [2021-12-06 23:57:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12936245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:57:32,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:57:32,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 15] total 23 [2021-12-06 23:57:32,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189123772] [2021-12-06 23:57:32,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:57:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 23:57:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 23:57:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:57:32,513 INFO L87 Difference]: Start difference. First operand 85937 states and 134269 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-06 23:57:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:38,228 INFO L93 Difference]: Finished difference Result 165275 states and 345515 transitions. [2021-12-06 23:57:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:57:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 430 [2021-12-06 23:57:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:38,615 INFO L225 Difference]: With dead ends: 165275 [2021-12-06 23:57:38,615 INFO L226 Difference]: Without dead ends: 80534 [2021-12-06 23:57:39,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 963 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:57:39,176 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:39,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 282 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:57:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80534 states. [2021-12-06 23:57:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80534 to 77356. [2021-12-06 23:57:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77356 states, 50585 states have (on average 1.0170208559849758) internal successors, (51446), 50278 states have internal predecessors, (51446), 14708 states have call successors, (14708), 2351 states have call predecessors, (14708), 12059 states have return successors, (60486), 24726 states have call predecessors, (60486), 14472 states have call successors, (60486) [2021-12-06 23:57:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77356 states to 77356 states and 126640 transitions. [2021-12-06 23:57:44,658 INFO L78 Accepts]: Start accepts. Automaton has 77356 states and 126640 transitions. Word has length 430 [2021-12-06 23:57:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:44,658 INFO L470 AbstractCegarLoop]: Abstraction has 77356 states and 126640 transitions. [2021-12-06 23:57:44,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 17 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-12-06 23:57:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 77356 states and 126640 transitions. [2021-12-06 23:57:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-06 23:57:44,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:44,710 INFO L514 BasicCegarLoop]: trace histogram [59, 50, 34, 30, 30, 30, 30, 30, 30, 25, 24, 24, 24, 24, 24, 22, 22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:44,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 23:57:44,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-06 23:57:44,911 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-06 23:57:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1079953773, now seen corresponding path program 7 times [2021-12-06 23:57:44,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442640242] [2021-12-06 23:57:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:44,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:57:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-06 23:57:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:57:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:57:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-06 23:57:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:57:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-06 23:57:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:57:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 23:57:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 23:57:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:57:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:57:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 23:57:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 23:57:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-06 23:57:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-06 23:57:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 23:57:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 23:57:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-12-06 23:57:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2021-12-06 23:57:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-06 23:57:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2021-12-06 23:57:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-12-06 23:57:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2021-12-06 23:57:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 2439 proven. 1430 refuted. 0 times theorem prover too weak. 6122 trivial. 0 not checked. [2021-12-06 23:57:46,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442640242] [2021-12-06 23:57:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442640242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123292358] [2021-12-06 23:57:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:57:46,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:46,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:46,331 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:46,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29076f16-f425-4120-8ae1-4ff7562b02a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 23:57:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 23:57:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 3339 proven. 2490 refuted. 0 times theorem prover too weak. 4162 trivial. 0 not checked. [2021-12-06 23:57:47,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9991 backedges. 3403 proven. 3514 refuted. 0 times theorem prover too weak. 3074 trivial. 0 not checked. [2021-12-06 23:58:00,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123292358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:58:00,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:58:00,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 42, 66] total 125 [2021-12-06 23:58:00,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457996287] [2021-12-06 23:58:00,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:58:00,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-06 23:58:00,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-06 23:58:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=14095, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 23:58:00,037 INFO L87 Difference]: Start difference. First operand 77356 states and 126640 transitions. Second operand has 125 states, 125 states have (on average 2.872) internal successors, (359), 97 states have internal predecessors, (359), 65 states have call successors, (70), 10 states have call predecessors, (70), 44 states have return successors, (101), 59 states have call predecessors, (101), 57 states have call successors, (101)